issues: 690624634

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
690624634 MDU6SXNzdWU2OTA2MjQ2MzQ= 4401 problem with time axis values in line plot 15570875 closed 0     4 2020-09-02T01:15:14Z 2021-10-23T16:27:32Z 2021-08-10T22:45:20Z NONE      

When I run the following code inside a jupyter notebook, the values on the x axis (time) in the generated plot, inserted after the code, appear to run from 0 to ~4. I expect them to run from 1 to 4, like the time values do. I can't tell if this is a problem with what xarray passes to nc_time_axis, or if it's a problem with nc_time_axis itself. Could this be looked into please?

``` import cftime import xarray as xr

time_vals = [cftime.DatetimeNoLeap(1+year, 1+month, 15) for year in range(3) for month in range(12)]

x_vals = [time_val.year + time_val.dayofyr / 365.0 for time_val in time_vals]

x_da = xr.DataArray(x_vals, coords=[time_vals], dims=["time"])

x_da.plot.line("-o"); ```

Environment:

Output of <tt>xr.show_versions()</tt> INSTALLED VERSIONS ------------------ commit: None python: 3.7.8 | packaged by conda-forge | (default, Jul 31 2020, 02:25:08) [GCC 7.5.0] python-bits: 64 OS: Linux OS-release: 3.10.0-1127.13.1.el7.x86_64 machine: x86_64 processor: x86_64 byteorder: little LC_ALL: en_US.UTF-8 LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 libhdf5: 1.10.6 libnetcdf: 4.7.4 xarray: 0.16.0 pandas: 1.1.1 numpy: 1.19.1 scipy: 1.5.2 netCDF4: 1.5.4 pydap: None h5netcdf: None h5py: None Nio: None zarr: 2.4.0 cftime: 1.2.1 nc_time_axis: 1.2.0 PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: 1.3.2 dask: 2.14.0 distributed: 2.14.0 matplotlib: 3.3.1 cartopy: 0.18.0 seaborn: 0.10.1 numbagg: None pint: 0.15 setuptools: 49.6.0.post20200814 pip: 20.2.2 conda: None pytest: 6.0.1 IPython: 7.17.0 sphinx: None 
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